Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 182 · 40 questions

What you do (Coins × distance): 1. Balance the ruler on the pencil at its 15 cm mark. 2. Put coins at a measured distance on the left side. 3. Place coins on the right and slide them until the ruler balances. 4. Check: coins × distance on the left = coins × distance on the right; press gently.

1. 1.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a magnet (d) coins of one kind
3. 3.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
4. 4.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) a flat table (d) coins of one kind
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) distance from the pencil (c) which side goes down
7. 7.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the left side (d) the right side
8. 8.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the number of coins (b) where the pencil is (c) which side goes down (d) the kind of coins
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a ramp (c) a sloping road (d) a well pulley
15. 15.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the spoon is magnetic (d) the lid gets softer
18. 18.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
19. 19.True or false: a see-saw is an inclined plane. (a) True (b) False
20. 20.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
21. 21.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a bottle opener (c) a crowbar (d) a steering wheel
22. 22.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
23. 23.True or false: a steering wheel is a wheel and axle. (a) True (b) False
24. 24.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
25. 25.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
26. 26.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
27. 27.True or false: a slide is a lever. (a) True (b) False
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
29. 29.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
31. 31.⚙️ Which of these is a lever? (a) a ramp (b) a tap handle (c) a steering wheel (d) a bottle opener
32. 32.⚙️ Which of these uses a pulley? (a) a flagpole (b) a sloping road (c) a slide (d) a ramp
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
34. 34.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
35. 35.True or false: a crowbar is a lever. (a) True (b) False
36. 36.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) coins of one kind (d) a mirror
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) turmeric powder (d) coins of one kind
38. 38.True or false: a bottle opener is a lever. (a) True (b) False
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
40. 40.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left

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